Search results for "Octene"

Über die oligomerisierung von Cycloocten

1972

Cycloocten wurde in Anwesenheit des Katalysatorsystems WCl6/C2H5OH/C2H5AlCl2 oligomerisiert mit dem Ziel, die homologe Reihe (C8H14)n darzustellen. Es wurden die Reaktionsbedingungen, besonders hinsichtlich der Katalysator-Konzentration, und der Einflus des Losungsmittels untersucht. Die isolierten Oligomeren (Dimeres, Trimeres) wurden IR-, NMR- und massenspektrometrisch charakterisiert. Cyclooctene was oligomerized in the presence of the catalytic system WCl6/C2H5OH/C2H5AlCl2 in order to prepare the homologous series (C8H14)n. The conditions of reaction were established particularly with respect to the catalyst concentration. The influence of the solvent was investigated. The oligomers pre…

1972

The metathesis reaction of cyclooctene was investigated with respect to the solvent, the catalyst, and the ratio of its components. A necessary condition for an active metathesis catalyst appears to be the presence of two transition metal-carbon bonds in a complex of the transition metal compound with an aluminum halide. A structure for the active complex is proposed. Die Metathese-Reaktion von Cycloocten wurde unter dem Einflus verschiedener Losungsmittel, verschiedener Katalysatorsysteme und Verhaltnisse der Katalysatorkomponenten untersucht. Die Ergebnisse lassen darauf schliesen, das die aktiven Katalysatoren Komplexe besonderer Ubergangsmetallverbindungen mit Aluminiumhalogeniden darst…

CCDC 634268: Experimental Crystal Structure Determination

2007

Related Article: S.Dobis, D.Schollmeyer, Chunmei Gao, Derong Cao, H.Meier|2007|Eur.J.Org.Chem.|2007|2964|doi:10.1002/ejoc.200700140

CCDC 251049: Experimental Crystal Structure Determination

2005

Related Article: R.Herges, A.Papafilippopoulos, K.Hess, C.Chiappe, D.Lenoir, H.Detert|2005|Angew.Chem.,Int.Ed.|44|1412|doi:10.1002/anie.200461632

A comparative study on the polymerization of 1-octene promoted by vanadium and titanium complexes supported by phenoxyimine and salen type ligands

2013

Polymerizations of 1-octene were carried out in the presence of vanadium and titanium complexes bearing salen-type or phenoxyimine ligands activated with various co-catalysts. Vanadium complexes turned out active only in conjunction with MAO, whereas the titanium ones were active in combination with Al(i-Bu)3/Ph3CB(C6F5)4. The activity of all catalysts was moderate or low and it was dependent on the ligand type: bis(phenoxyimine) complexes were more active than the salen ones. Both vanadium and titanium catalytic systems produced poly(1-octene)s possessing atactic structures with [mmmm] sequences in the range from 12 to 56 % at room temperature. A temperature decrease to 0.5 °C for the reac…

Effect of culture parameters on the production of styrene (vinyl benzene) and 1-octene-3-ol by Penicillium caseicolum

1992

SummaryPenicillium caseicolum has been shown to completely synthesize styrene. A medium was developed to test the capacity of different strains for this synthesis. In a synthetic medium, styrene production began only after the glucose was entirely consumed. This production depended on storage temperature and occurred simultaneously with 1-octene-3-ol formation.

The Catalytic Effect of Fluoroalcohol Mixtures Depends on Domain Formation

2017

In the present contribution, we investigated catalytically active mixtures of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) and aqueous H2O2 by molecular dynamics simulations. It is clearly observable that the HFIP molecule strongly binds to the H2O2, which is necessary for the desired catalytic reaction to occur. Upon the addition of the substrate cyclooctene to the solution, this interaction is enhanced, which suggests that the catalytic activity is increased by the presence of the hydrocarbon. We could clearly observe the microheterogeneous structure of the mixture, which is the result of the separation of the hydroxyl groups, water, and H2O2 from the fluorinated alkyl moiety in the form of l…

Novel diamine-bis(phenolate) Ti(IV) complexes – tuning the complex structure to control catalytic properties in α-olefin polymerization

2016

Abstract Four monomeric titanium(IV) dichloride complexes of amine-bis(phenolate) ligands having an extra donor arm (2a–2d) and one oxo-bridged complex 3 were successfully synthesized in the reaction of TiCl4 with a sodium salt of the appropriate ligand, and they were characterized by 1H NMR spectroscopy. The ligands had either a dimethylamino side‐arm donor and t-Bu substituents on both (1a) and one (1d) phenolate rings or a diisopropylamino side-arm donor and t-Bu (1b) and t-Bu along with OMe (1c) phenolate substituents. All complexes upon activation with [Ph3CB(C6F5)4] and MAO were used to catalyze polymerization of 1-octene (in liquid monomer) into poly(1-octene). Their activities as we…

Model Pumices Supported Metal Catalysts

1997

The catalyzed, selective hydrogenation, in liquid phase, of 1,3-cyclooctadiene was studied on a series of Pd catalysts supported on natural pumice, model pumices (with variable content of alkali metal ions), silica, and sodium-doped silica. At constant pressure of H2(1 atm.) the reaction follows a zero-order kinetic for all the Pd catalysts. At low metal dispersion (Dx < 20%), Pd/pumice catalysts exhibit higher activity as compared to Pd/silica catalysts; the turnover frequency is maintained even at high metal dispersion in Pd/pumice but Pd/silica and Pd/model pumices without alkali ions show a decrease in activity. At increasingDx, the binding energy shift of Pd 3dlevel is negative in Pd/p…

Synthesis, Structure and Catalytic Properties of Dinuclear Mo-VI Complexes with Ditopic Diaminotetraphenols

2013

MoVI complexes with novel ditopic diaminotetraphenol ligands have been prepared by using a one-pot procedure in methanol or DMSO with [MoO2(acac)2] (acac = acetylacetonate) as the molybdenum source. The complexes were characterised with X-ray diffraction, NMR spectroscopic studies, elemental analysis and IR spectroscopy. In the solid state, the compounds represent either a rodlike molecular or oxido-bridged polymeric structure. The catalytic activity of the complexes was investigated by oxidising benzyl alcohol and 1-phenylethanol with hydrogen peroxide to the corresponding aldehyde and ketone, respectively. Furthermore, the catalytic activity was surveyed also in epoxidation of cyclooctene.